MASTER DH 720 P Condensation Dehumidifier User Manual

: June 6, 2024
: MASTER

Table of Contents

MASTER DH 720 P Condensation Dehumidifier
Overview
HOW IT WORKS
WHERE TO POSITION
GENERAL CAUTIONS
OPERATION
CONTINUOUS DRAINAGE
MAINTENANCE
STORAGE
THE UNIT DOES NOT OPERATE
References
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MASTER DH 720 P Condensation Dehumidifier

Overview

PLEASE TAKE TIME TO READ THIS MANUAL CAREFULLY BEFORE USE AND SAVE IT FOR FUTURE REFERENCE.

HOW IT WORKS

This product is a dehumidifier. It controls relative humidi-ty by passing the air through the unit, forcing the excess moisture to condensate over the cooling elements. Contact with this cold surface causes the moisture in the air to con-dense. This condensed water then drains safely into the water tank. The dried air then passes through the conden-ser where it is slightly warmed and re-enters the room at a slightly elevated temperature.

MASTER-DH-720-P-Condensation-Dehumidifier-2

Dry warmer air
Condenser (warmed coil)
Evaporator (cold refrigerated coil)
Moist saturated air
Water tank
Compressor
Motor
Fan rotor

WHERE TO POSITION

Excess moisture will travel throughout your home, in the same way that cooking smells waft to every room in the house. For this reason, the dehumidifier should be posi-tioned, so that it can draw this moist air towards it from all over the home. Alternatively, if you have a serious problem in one area you can begin by positioning the dehumidifier close to this area and later moving it to a more central point. When positioning the dehumidifier, ensure that it is placed on a level surface and that there is a minimum of 10 cm (4”) of space on either side of the unit to allow for efficient airflow. This dehumidifier is fitted with castors for extra mobility, if you move the unit, it should first be switched off and the water tank emptied. We do not recommend the use of an extension lead, so please try to ensure that the unit is sufficiently close to a fixed mains socket. If it is necessary to use am extension lead, please ensure the diameter of the wires of the cable is at least 1 mm2.When the dehumidifier is in operation, outside doors and windows should be closed when necessary for most ef-ficient use .

GENERAL CAUTIONS

FOR INDOOR USE ONLY.
Do not use in cabinet, closet, boats, caravans or similar locations.
Do not use the unit in swimming pools, washrooms or similar wet areas.
Leave the unit to stand for 12hours before connecting to the mains supply after transport or when it has been titled (ex. During cleaning).
Only use the unit in the upright position on a flat level surface (even during transport!) and at least 50cm from any objects.
Do not use the unit in a potentially explosive environ-ment containing combustible liquids, gases or dusts.
Do not use the appliance in the vicinity of flammable orexplosive substances or fuels. Never use any paint, clea-ning sprays, anti-insect sprays or similar near the unit; this could deform the plastic or cause electrical damage.
Ensure that there is at least 50cm between the sides of the appliance and any flammable, heating materials.
Do not place objects on the unit or restrict air inlet/out-let.
Avoid the unit from splash.
Closely supervise any children and pets when the unit is in use.
CHILDREN SHALL NOT PLAY WITH APPLIANCE.
Cleaning and user maintenance shall not be made by children without supervision.
Switch off and unplug the unit when not in use.
Never leave a functioning device unsupervised.
Do not pull the unit along by the cord.
Avoid over-twisting, -coiling, -pulling the power cord, never use nylon or iron wire to tide the power cord.
Make sure that the plug and socket remain visible and accessible at all the time.
Do not use extension cords.
Never reach to retrieve the unit if it has fallen in wa-ter. In such case, immediately pull the plug. Have the unit checked before using it again.
The appliance shall be installed in accordance with na-tional wiring regulations.
Do not exceed the recommended room size for max.
Close the doors and windows.
Keep curtains or blinds closed during the sunniest hours of the day.
Keep filters clean.
Once room has reached the desired conditions, reduce the setting for temperature and ventilation.
Do not turn on the appliance if you have discovered da-mage to the appliance, cord or plug, if the appliance is mal-functioning or if there are signs of any other defect. Return the complete product to the vendor or to a certified elec-trician for inspection and/or repair. Always ask for original parts. The appliance (incl. cord and plug) may only be ope-ned and/or repaired by properly authorized and qualified persons.
Suggest to send the unit for professional maintenance
Always keep the unit in vertical position.
Keep all foreign objects away from the air intake or out-put openings.
The mains supply must conform to the specification shown on the rating plate at the back of the unit.
If the supply cord is damaged, it must be replaced by an approved service representative or a similar qualified person in order to avoid a hazard.
Never use the plug to start and stop the unit. Always
Before moving the unit, first switch off, then unplug and empty the water tank.
Don’t use bug sprays or other flammable cleaners on the unit.
Never pour or spray water over the unit.
THIS APPLIANCE IS NOT INTENDED FOR USE BY PERSONS (INCLUDING CHILDREN) WITH REDUCED PHYSICAL , SENSORY OR MENTAL CAPABILITIES, OR LACK OF EXPERIENCE AND KNOWLEDGE , UNLESS THEY HAVE BEEN GIVEN SUPERVISION OR INSTRUC-TION CONCERNING USE OF THE APPLIANCE BY A PERSON RESPONSIBLE FOR THEIR SAFETY. CHILD-REN SHOULD BE SUPERVISED TO ENSURE THAT THEY DO NOT PLAY WITH APPLIANCE.

SAFETY RELATING TO REFRIGERANT R290:

Read these warnings carefully.
This appliance contains the refrigerant R290. R290is a refrigerant that complies with the relevant European Directives. Never perforate the refrigerant circuit. R290 is flammable (GWP3)!
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manu-facturer.
The appliance shall be stored in a room without continu-ously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater).
Do not pierce or burn any of the components of the coo-ling circuit of the unit. Do not set light to the unit.
The appliance shall be stored so as to prevent mecha-nical damage from occurring.
Appliance should be installed, operated and stored in a room with a floor area larger than 4m2.
Be aware that the refrigerants may not contain an odour, which means you cannot smell leaks.
Compliance with national gas regulations shall be ob-served.
Keep ventilation openings clear of obstruction.
A warning that the appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified for operation.
Any person who is involved with working on or breakinginto a refrigerant circuit should hold a current valid certi-ficate from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an industry recognized assess-ment specification.

IMPORTANT!
Do not use this unit at ambient temperatures below 5OC, to prevent the possibility of a heavily ice up evaporating coil.

PARTS
Front FIG. 2

Control panel
Ambient light
. Front plate
Rear plate

Rear FIG. 3

```
1.  Wind flap
```
Handle
Air inlet / Filters
Water level window
Water tankX 1

OPERATION

Control panel

Humidity setting button
Working mode indicator (continuous working, humidity 40%, 50%, 60%, 70%)
Humidity/Temperature display
Timer operation indicator
. Temperature display button
DRYER indicator
DRYER button
High ventilation indicator
Speed/Ventilation button
Low ventilation indicator
Power indicator
ON/OFF (power) button
“Full Water” indicator
TIMER button

Please note, the indicator in the front plate will light on in 3 different colors to reflect the ambient humidity level. By this, the user can understand immediately what the am-bient humidity condition is:

Blue light – room humidity > 70%
Green light – room humidity 50~70%
Red light –room humidity < 50%
Red light flash – water full alarm

Operation

Plug the unit into a correct mains socket. (Please refer to the rating label at the rear of the unit for correct vol-tage/frequency.)
Press ON/OFF button to turn on the unit. The compres-sor will start to work.
Press humidity setting button to set the working model you need: continuous working, humidity 40%, 50%, 60% or 70%. The relative indicator will light on.
Press speed/ventilation button to set the ventilation speed, high or low. The relative indicator will light on.
Press the TIMER button to set the operating hour you need (1~24 hours). The display window will show the hour(s) you set as you press the TIMER button, after releasing it for 8 seconds around, the display window will return to the room humidity. As the set time has been reached, the compressor will stop working auto-matically.
By pressing the ”TEMP” button, the display window will show the room temperature, after releasing the button for 8 seconds around, the display window will return to the room humidity.
DRYER function is turbo ventilation to dry the moistu-re in the air continuously, so it could help to dry the laundry.
To turn off the unit, press ON/OFF button again. Pre-setting function By pressing TIMER button but wit-hout turning on the other functions (including ON/OFF button), you can PRE-SET the time for the machine to work. For example, if you press the timer to ’2’, the unit will work automatically after 2 hours

DRAINAGE
While the water tank is full, the compressor will stop for self-protection and the water full indicator will turn into red. To move the water tank, pull it out squarely from the unit. After empting the water tank, place the water tank into spa-ce. Make sure it is properly positioned, in order for the ’wa-ter full’ sign to go out and your dehumidifier is operating. Please note, in case, the water tank has not been positio-ned well, the water full indicator will turn into red.

CONTINUOUS DRAINAGE

When the dehumidifier is operated at very high humidity levels, the water tank will require more frequent drainage. In this situation, it may be more convenient to set the unit up for continuous drainage with the following procedures:

Pull out the water tank .
Connect the drain hole with water tube of inner diame-ter: 11 mm. The water tube is not supplied with the unit.
Ensure the water will always drain away freely and the tube will remain in right place. Note! In very cold weather conditions, precautions should be taken to prevent the wa-ter tube from freezing.
Put the water tank back to its position.

MAINTENANCE

Always unplug the unit from the mains before carrying out any maintenance or cleaning of the unit.\

CLEANING THE BODY
Use soft cloth to wipe the unit clean.
Don’t ever use volatile chemicals, gasoline, detergents, chemically treated clothes, or other cleansing solutions. These all could possibly hurt the cabinet.

CLEANING THE FILTER
This dehumidifier is equipped with 2 filters: MASTER-DH-720-P-Condensation-
Dehumidifier-83

ANTI-DUST FILTER Extract the filter holder, remove the active carbon filter. Use a vacuum cleaner or tap the filter lightly for easy clea-ning. If the filter is particularly dirty, use warm water with a small amount of a small amount of medium strength detergent. Make sure the filter is completely dry before replacing. Do not expose the filter to sunlight.
ACTIVE CARBON FITLER (for capturing the particles of dust suspended in the air and preventing the produc-tion of bacteria.) The active carbon filter placed under the anti-dust filter is not washable. Its life span is variable and depends on the ambient conditions where the unit is used. The filter should be checked periodically and replaced if necessary.

STORAGE

If not use the unit for an extended period of time. Please: Turing the unit off, unplug and tidy AC cord.

Completely empty the water tank and wipe it clean.
Cover the unit and store where it will not receive direct sunlight.

TROUBLE SHOOTING

THE UNIT DOES NOT OPERATE

Is the unit plugged in?
Is the house electricity on?
Is the room temperature below 5OC or above 35OC? If so, then it is out of the working range of the unit.
Ensure the humidistat (or ON/OFF switch) is turned
Check the water tank is positioned properly in the unit and it is not full.
Make sure the air inlet and outlet are not obstructed.

THE UNIT SEEMS TO DO NOTHING:

Is the filter dusty, contaminated ?
Is the air intake or outlet blocked up?
Is the room humidity already quite low?

THE UNIT SEEMS TO DO LITTLE:

Are too many windows or doors open?
Is there something in the room producing lots of humi-dity?

THE UNIT IS TOO NOISY:

Check whether the unit is sitting on a level surface.

THE UNIT IS LEAKING:

Make sure the unit is in good shape.
If you are not using continuous drainage, make sure the rubber plug (at the bottom of the unit) is in its position.

Error codes on display

Error codes on display

Code| Cause| Solution
E1| The room temperature sen- sor (with resin head) is open or short circuit fault| Checking if the room tem- perature sensor is plugged in properly on the PCB.
Replace the room tem- perature sensor of room temp.
Replace main PC board.
The humidity level is be- low RH40%
E2| The system sensor (with copper head) is open or short circuit fault| Checking if the system sensor is plugged in pro- perly on the PCB.
Replace the system sen- sor
Replace main PC board.
E3| The Temperature Control (TC) sensor wire is loosen or breaks down.

The machine will beep for 3 sounds, the E3 code will flash on every one second. The compressor and fan mo- tor will stop.

| Pls check and replace it.
E5| When the TC sensor wire senses the temperature is > or = 130oC more than 5 se- conds, the E5 code will flash on every second, the machi- ne will beep for 3 sounds.

The compressor and fan mo- tor stop.

| When it happens, pls press ON/OFF button on and off again to check if E5 signal still exists, if yes, that means the compres- sor system is abnormal. Pls check it and get rid of the mal-function.